In the 125th paragraph of "The Gay Science", Nietzsche announces the death of God but I have some doubts. Why God is dead? What is the reason of it? And why did Nietzsche announce it in front of an atheistic public?
When Nietzsche announces the death of God, due to his own contributions and that of his contemporaries and predecessors to philosophical progress, he means reliance on religion as a moral compass and source of meaning, is no longer tenable or relevant. Thus "god is dead", or more so the authority of god in the lives of people, is dead. I think he announced it in front of an atheistic public because he thought they'd be most receptive.